Sfarfallio dello schermo / PWM (Pulse-Width Modulation)

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To dim the screen, some notebooks will simply cycle the backlight on and off in rapid succession - a method called Pulse Width Modulation (PWM) . This cycling frequency should ideally be undetectable to the human eye. If said frequency is too low, users with sensitive eyes may experience strain or headaches or even notice the flickering altogether.

flickering dello schermo / PWM rilevato

208.3 Hz

≤ 50 % settaggio luminosita'

Il display sfarfalla a 208.3 Hz (Probabilmente a causa dell'uso di PWM) Flickering detected at a brightness setting of 50 % and below. There should be no flickering or PWM above this brightness setting.

The frequency of 208.3 Hz is relatively low, so sensitive users will likely notice flickering and experience eyestrain at the stated brightness setting and below.

In comparison: 52 % of all tested devices do not use PWM to dim the display. If PWM was detected, an average of 8781 (minimum: 43 - maximum: 142900) Hz was measured.

(+) The average temperature for the upper side under maximal load is 29.8 °C / 86 F, compared to the average of 27.8 °C / 82 F for the devices in the class Desktop.(+) The maximum temperature on the upper side is 31.2 °C / 88 F, compared to the average of 33.4 °C / 92 F, ranging from 25.2 to 47 °C for the class Desktop.(-) The bottom heats up to a maximum of 46.1 °C / 115 F, compared to the average of 33.7 °C / 93 F(+) In idle usage, the average temperature for the upper side is 24.2 °C / 76 F, compared to the device average of 27.8 °C / 82 F.

Frequency diagram (checkboxes can be checked and unchecked to compare devices)

Apple iMac Pro audio analysis

(+) | speakers can play relatively loud (86.1 dB)Bassi 100 - 315 Hz(+) | good bass - only 3.5% away from median(±) | linearity of bass is average (7.6% delta to prev. frequency)Mids 400 - 2000 Hz(+) | balanced mids - only 1.8% away from median(+) | mids are linear (4.1% delta to prev. frequency)Highs 2 - 16 kHz(±) | reduced highs - on average 8.2% lower than median(+) | highs are linear (4.8% delta to prev. frequency)Overall 100 - 16.000 Hz(+) | overall sound is linear (9.1% difference to median)Compared to same class» 0% of all tested devices in this class were better, 50% similar, 50% worse» The best had a delta of 9%, average was 13%, worst was 18%Compared to all devices tested» 2% of all tested devices were better, 0% similar, 98% worse» The best had a delta of 3%, average was 21%, worst was 53%

Apple MacBook 12 (Early 2016) 1.1 GHz audio analysis

(+) | speakers can play relatively loud (83.6 dB)Bassi 100 - 315 Hz(±) | reduced bass - on average 11.3% lower than median(±) | linearity of bass is average (14.2% delta to prev. frequency)Mids 400 - 2000 Hz(+) | balanced mids - only 2.4% away from median(+) | mids are linear (5.5% delta to prev. frequency)Highs 2 - 16 kHz(+) | balanced highs - only 2% away from median(+) | highs are linear (4.5% delta to prev. frequency)Overall 100 - 16.000 Hz(+) | overall sound is linear (9.3% difference to median)Compared to same class» 2% of all tested devices in this class were better, 2% similar, 96% worse» The best had a delta of 8%, average was 19%, worst was 50%Compared to all devices tested» 2% of all tested devices were better, 1% similar, 98% worse» The best had a delta of 3%, average was 21%, worst was 53%